ZyWall 5 VPN only connects 1 users???

Posted on 2007-03-18
Last Modified: 2012-05-05
I have a ZyWall 5 firewall and I am having problems connecting remote users to the VPN I configured.  The ZyWall supports up to 10 connections but every time a remote user connects it kicks off whoever was already logged in?  There are 5 users I would like to have connected and they are connecting from dynamic locations changing all the time to the one main office.  Any help would be great.

Question by:cgriffith4
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 2
LVL 77

Expert Comment

by:Rob Williams
ID: 18745869
Are the remote users connecting from the same site?
If so, this is only possible if your Zywall supports NAT-T. If they are connecting from different sites, it is a different issue.

Author Comment

ID: 18749020
The users will be connecting from different sites all the time which makes this a difficult problem.  Any suggestions?
LVL 77

Expert Comment

by:Rob Williams
ID: 18749043
They will be or they are ? If when testing you are doing so from the same site it will almost certainly only allow one connection. However, using multiple sites, with 1 user per site shouldn't be a problem. The issue is each user needs to have a different public IP, unless NAT-T (Network Address Translation - Traversal) is supported and enabled.
Optimizing Cloud Backup for Low Bandwidth

With cloud storage prices going down a growing number of SMBs start to use it for backup storage. Unfortunately, business data volume rarely fits the average Internet speed. This article provides an overview of main Internet speed challenges and reveals backup best practices.


Author Comment

ID: 18749507
Sorry.  To be more clear the users are connecting from different locations all the time.  There are 5 users connecting from laptops from different hospitals simultaneously throughout the day.  The current setup works great for 1 user at a time.  As soon as a user connects someone else is bumped off only allowing 1 concurrent connection.  I am having trouble allowing multiple concurrent VPN connections.

LVL 77

Accepted Solution

Rob Williams earned 500 total points
ID: 18759648
I am not familiar with the Zywall units so I had a look at the on-line manuals and a few things to consider:
-each user must have a different local subnet. i.e user 1 might use locally something like 192.168.10.x, user 2 192.168.20.x and so on. If they use the same subnet you can have problems
-for the mobile clients are you using aggressive or main negotiation mode ? Try aggressive , if not using it
-are you making use of the "local user database" on the Zywall ? If so each connection should likely use a different user name if connecting simultaneously
-are there any other routers at the Zywall site, between it and the modem ? If so it could be limiting 1 connection. The modem , especially if a combined modem and router unit might also be doing so, but I have never seen issues with simple modems.
LVL 77

Expert Comment

by:Rob Williams
ID: 18773144
Thanks cgriffith4.
Cheers !

Featured Post

Back Up Your Microsoft Windows Server®

Back up all your Microsoft Windows Server – on-premises, in remote locations, in private and hybrid clouds. Your entire Windows Server will be backed up in one easy step with patented, block-level disk imaging. We achieve RTOs (recovery time objectives) as low as 15 seconds.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

A small collection of useful tips and tricks for Windows 10 users that I decided to write as a result of recent questions that were asked and answered at Experts Exchange. Two short video tutorials included. Enjoy..
Ever visit a website where you spotted a really cool looking Font, yet couldn't figure out which font family it belonged to, or how to get a copy of it for your own use? This article explains the process of doing exactly that, as well as showing how…
Internet Business Fax to Email Made Easy - With  eFax Corporate (, you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, f…
There's a multitude of different network monitoring solutions out there, and you're probably wondering what makes NetCrunch so special. It's completely agentless, but does let you create an agent, if you desire. It offers powerful scalability …

705 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question